diff --git a/app/bench-cp.cc b/app/bench-cp.cc
index 8a27678..76c5035 100644
--- a/app/bench-cp.cc
+++ b/app/bench-cp.cc
@@ -31,7 +31,7 @@ int main(int argc, char *argv[])
     auto tf = std::chrono::high_resolution_clock::now();
     auto d = tf - ti;
     std::cout << d / 1ms << " ms" << std::endl <<
-        (double)(s >> 20) / (d / 1.s) << " MB/s" << std::endl;
+        (double)(s >> 20) / (d / 1.0s) << " MB/s" << std::endl;
 
     return 0;
 }